2609118505987 has 4 divisors (see below), whose sum is σ = 2981849721136. Its totient is φ = 2236387290840.

The previous prime is 2609118505957. The next prime is 2609118505991. The reversal of 2609118505987 is 7895058119062.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2609118505987 - 2⁷ = 2609118505859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2609118505927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186365607564 + ... + 186365607577.

It is an arithmetic number, because the mean of its divisors is an integer number (745462430284).

Almost surely, 2^{2609118505987} is an apocalyptic number.

2609118505987 is a deficient number, since it is larger than the sum of its proper divisors (372731215149).

2609118505987 is an equidigital number, since it uses as much as digits as its factorization.

2609118505987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372731215148.

The product of its (nonzero) digits is 10886400, while the sum is 61.

The spelling of 2609118505987 in words is "two trillion, six hundred nine billion, one hundred eighteen million, five hundred five thousand, nine hundred eighty-seven".